The Ubuntu kernel guys have released an “official” build of the 2.6.29 Linux Kernel which came out tonight. The .deb files work for both Ubuntu and Debian! (and outdated, stable and test releases like Ubuntu 9.04 jaunty jackalope. More here

The included kernel files have been compiled using the generic ubuntu configuration but lack ubuntu specific drivers. Note: nVIDIA ForceWare drivers are automaticly installed using DKMS (which is included in Ubuntu 8.10)